Dear ***,

We have just confirmed that blocklists used by Spamhaus, one of the most stringent anti-spam organizations active today, have recently been adopted by Yahoo.
 
What it Means
ISPs are free to filter email as they see fit and they've traditionally relied on their internal lists and tools to do so. By using Spamhaus, Yahoo has now added an "outsourced" filtering solution in addition to their internal mechanisms. Compliance guidelines at Spamhaus are very strict and they may require emailers to follow certain procedures, such as implementation of double opt-in registration.

Are You Affected?
As you may know, a "spam trap" is an email address specifically set up to attract and identify unsolicited commercial email. Any emailer who has a spam trap address in their database may trigger the Spamhaus blocklist, which will now affect delivery to Yahoo.com and Yahoo.biz addresses.

What To Do? Request a BlueHornet Demo.
Maintaining good list hygiene can help ensure that spam traps do not contaminate your house list. BlueHornet has led the industry in double opt-in email programs that keep your lists clean. And, only BlueHornet offers the SureSend(TM) deliverability enhancement platform, which includes integrated tools that can tell you whether you are experiencing delivery issues at Yahoo and 19 other top ISPs. SureSend also includes services that include identification of any known spam traps or bad addresses. For more information, request a demo today.